Margret Groß-Hardt

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The task of transferring knowledge from a human to a computer has always been challenging, and even more so when the knowledge comes from multiple sources. It has been the role of knowledge acquisition tools to help in solving this problem. In this paper, we introduce a novel elicitation algorithm for knowledge base construction. An experiment is currently(More)
In the last years, semistructured data has played an increasing role within the database community. Many query languages have been developed for querying semistructured data and in particular XML data sources. The languages usually are navigational and therefore require the user to know the details of the database structure. This paper introduces concept(More)
In this paper we introduce a personalized way of presenting learning material, which is in particular suited for the use in e-Learning environments. We will explain the knowledge-based aspects of this technology, and we demonstrate with an example the additional feature of interactivity, by which the approach deserves the name ”Living Book”. The various(More)
We aim to demonstrate that automated deduction techniques, in particular those following the model computation paradigm, are very well suited for database schema/query reasoning. Specifically, we present an approach to compute completed paths for database or XPath queries. The database schema and a query are transformed to disjunctive logic programs with(More)
The growing use of XML in commercial as well as non-commercial domains to transport information poses new challenges to concepts to access these information. Common ways to access parts of a document use XPathexpressions. We provide a transformation of DTDs into a knowledge base in Description Logic. We use reasoning capabilities in Logic to decide, if a(More)
In the last years, semistructured data has played an increasing role within the database community. Many query languages have been developed for querying semistructured data and in particular XML data sources. XML data often is described by means of DTDs and more recently through XML schemas. This paper is about querying semistructured data by making use of(More)